Completed

Make minor modifications to a C keygen file

We have a License Key generator written in C with the format attached as a PNG file. Currently there is a 32 bit Checksum for the key. We need to use some of the 80 bits available from the key to use as a customer number. So we want to remove 8 bits from the Checksum for any key generated or decrypted after today's date. The Date is included as part of the License key generation. Hence

if ([login to view URL] > August 7th 2018)

use_24_bit_checksum();

else

{

use_32_bit_checksum();

use_customer_number(customer_from_command_line);

}

Customer number should be an extra input into the command line, if none is specified it should default to zero.

Skills: C Programming

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About the Employer:
( 164 reviews ) Hong Kong, Hong Kong

Project ID: #17525819

Awarded to:

gszo123zl

I have ~7 years of experience in C/C++ and over 3 in C#. I also write some Python code and recently Haskell, so I can do the task easily. Please contact me to discuss the details. Could you show me the C code?

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hbxfnzwpf

I am very proficient in c and c++. I have 16 years c++ developing experience now, and have worked for more than 7 years. My work is online game developing, and mainly focus on server side, using c++ under Linux environ More

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AndresManggini

Hello, I've done projects in different areas of IT around the world. Some of my skills are: C#.NET, C/C++, Java, Cryptography, SQL Server, Desktop Application, Web Services, bill acceptor, etc.. If you would like More

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Nuzcotek

Hello I can modify the License key Generator in C quickly for the format as given in the attached PNG file. Also change the 32 bit Checksum by conditionally removing 8-bits from it as per your requirement of the Da More

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